Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina
- Autores
- Galli, Claudia Inés; Coira, Beatriz Lidia Luisa; Alonso, Ricardo Narciso; Iglesia Llanos, Maria Paula; Prezzi, Claudia Beatriz; Kay, Suzanne Mahlburg
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- This paper presents the tectonostratigraphic evolution of the Maimara Basin and explores the relationship between the clastic sediments and pyroclastic deposits in the basin and the evolution of the adjacent orogeny and magmatic arc. The sedimentary facies in this part of the basin include, in ascending order, an ephemeral fluvial system, a deep braided fluvial system and a medial to distal ephemeral fluvial system. We interpret that Maimara Formation accumulated in a basin that has developed two stages of accumulation. Stage 1 extended from 7 to 6.4 Ma and included accelerated tectonic uplift in the source areas, and it corresponds to the ephemeral fluvial system deposits. Stage 2, which extended from 6.4 to 4.8 Ma, corresponds to a tectonically quiescent period and included the development of the deep braided fluvial system deposits. The contact between the Maimara and Tilcara formations is always characterized by a regional unconformity and, in the study area, also shows pronounced erosion.Rare earth element and other chemical characteristics of the tuff intervals in the Maimara Formation fall into two distinct groups suggesting the tuffs were erupted from two distinct late Miocene source regions. The first and most abundant group has characteristics that best match tuffs erupted from theGuacha, Pacana and Pastos Grandes calderas, which are located 200 and 230 km west of the study area at 22º-23º30´0 S latitude. The members the second group are chemically most similar to the Merihuaca Ignimbrite from the Cerro Galan caldera 290 km south-southwest of the studied section. The distinctive geochemical characteristics are excellent tools to reconstruct the stratigraphic evolution of the Neogene Maimara basin from 6.4 to 4.8 Ma.
Fil: Galli, Claudia Inés. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: Coira, Beatriz Lidia Luisa. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Salta; Argentina
Fil: Iglesia Llanos, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
Fil: Prezzi, Claudia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Fil: Kay, Suzanne Mahlburg. Cornell University; Estados Unidos - Materia
-
Maimara Formation
Paleomagnetism
Provenance
Maimara Formation
Geochemistry Tuffs
Humahuaca - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/43416
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Tectonostratigraphic history of the Neogene Maimará basin, Northwest ArgentinaGalli, Claudia InésCoira, Beatriz Lidia LuisaAlonso, Ricardo NarcisoIglesia Llanos, Maria PaulaPrezzi, Claudia BeatrizKay, Suzanne MahlburgMaimara FormationPaleomagnetismProvenanceMaimara FormationGeochemistry TuffsHumahuacahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1This paper presents the tectonostratigraphic evolution of the Maimara Basin and explores the relationship between the clastic sediments and pyroclastic deposits in the basin and the evolution of the adjacent orogeny and magmatic arc. The sedimentary facies in this part of the basin include, in ascending order, an ephemeral fluvial system, a deep braided fluvial system and a medial to distal ephemeral fluvial system. We interpret that Maimara Formation accumulated in a basin that has developed two stages of accumulation. Stage 1 extended from 7 to 6.4 Ma and included accelerated tectonic uplift in the source areas, and it corresponds to the ephemeral fluvial system deposits. Stage 2, which extended from 6.4 to 4.8 Ma, corresponds to a tectonically quiescent period and included the development of the deep braided fluvial system deposits. The contact between the Maimara and Tilcara formations is always characterized by a regional unconformity and, in the study area, also shows pronounced erosion.Rare earth element and other chemical characteristics of the tuff intervals in the Maimara Formation fall into two distinct groups suggesting the tuffs were erupted from two distinct late Miocene source regions. The first and most abundant group has characteristics that best match tuffs erupted from theGuacha, Pacana and Pastos Grandes calderas, which are located 200 and 230 km west of the study area at 22º-23º30´0 S latitude. The members the second group are chemically most similar to the Merihuaca Ignimbrite from the Cerro Galan caldera 290 km south-southwest of the studied section. The distinctive geochemical characteristics are excellent tools to reconstruct the stratigraphic evolution of the Neogene Maimara basin from 6.4 to 4.8 Ma.Fil: Galli, Claudia Inés. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; ArgentinaFil: Coira, Beatriz Lidia Luisa. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; ArgentinaFil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Salta; ArgentinaFil: Iglesia Llanos, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; ArgentinaFil: Prezzi, Claudia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaFil: Kay, Suzanne Mahlburg. Cornell University; Estados UnidosPergamon-Elsevier Science Ltd2016-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/43416Galli, Claudia Inés; Coira, Beatriz Lidia Luisa; Alonso, Ricardo Narciso; Iglesia Llanos, Maria Paula; Prezzi, Claudia Beatriz; et al.; Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 72; 12-2016; 137-1580895-9811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2016.09.007info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981116301766info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:10Zoai:ri.conicet.gov.ar:11336/43416instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:48:10.967CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina |
title |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina |
spellingShingle |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina Galli, Claudia Inés Maimara Formation Paleomagnetism Provenance Maimara Formation Geochemistry Tuffs Humahuaca |
title_short |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina |
title_full |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina |
title_fullStr |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina |
title_full_unstemmed |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina |
title_sort |
Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina |
dc.creator.none.fl_str_mv |
Galli, Claudia Inés Coira, Beatriz Lidia Luisa Alonso, Ricardo Narciso Iglesia Llanos, Maria Paula Prezzi, Claudia Beatriz Kay, Suzanne Mahlburg |
author |
Galli, Claudia Inés |
author_facet |
Galli, Claudia Inés Coira, Beatriz Lidia Luisa Alonso, Ricardo Narciso Iglesia Llanos, Maria Paula Prezzi, Claudia Beatriz Kay, Suzanne Mahlburg |
author_role |
author |
author2 |
Coira, Beatriz Lidia Luisa Alonso, Ricardo Narciso Iglesia Llanos, Maria Paula Prezzi, Claudia Beatriz Kay, Suzanne Mahlburg |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Maimara Formation Paleomagnetism Provenance Maimara Formation Geochemistry Tuffs Humahuaca |
topic |
Maimara Formation Paleomagnetism Provenance Maimara Formation Geochemistry Tuffs Humahuaca |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
This paper presents the tectonostratigraphic evolution of the Maimara Basin and explores the relationship between the clastic sediments and pyroclastic deposits in the basin and the evolution of the adjacent orogeny and magmatic arc. The sedimentary facies in this part of the basin include, in ascending order, an ephemeral fluvial system, a deep braided fluvial system and a medial to distal ephemeral fluvial system. We interpret that Maimara Formation accumulated in a basin that has developed two stages of accumulation. Stage 1 extended from 7 to 6.4 Ma and included accelerated tectonic uplift in the source areas, and it corresponds to the ephemeral fluvial system deposits. Stage 2, which extended from 6.4 to 4.8 Ma, corresponds to a tectonically quiescent period and included the development of the deep braided fluvial system deposits. The contact between the Maimara and Tilcara formations is always characterized by a regional unconformity and, in the study area, also shows pronounced erosion.Rare earth element and other chemical characteristics of the tuff intervals in the Maimara Formation fall into two distinct groups suggesting the tuffs were erupted from two distinct late Miocene source regions. The first and most abundant group has characteristics that best match tuffs erupted from theGuacha, Pacana and Pastos Grandes calderas, which are located 200 and 230 km west of the study area at 22º-23º30´0 S latitude. The members the second group are chemically most similar to the Merihuaca Ignimbrite from the Cerro Galan caldera 290 km south-southwest of the studied section. The distinctive geochemical characteristics are excellent tools to reconstruct the stratigraphic evolution of the Neogene Maimara basin from 6.4 to 4.8 Ma. Fil: Galli, Claudia Inés. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina Fil: Coira, Beatriz Lidia Luisa. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina Fil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Salta; Argentina Fil: Iglesia Llanos, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina Fil: Prezzi, Claudia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina Fil: Kay, Suzanne Mahlburg. Cornell University; Estados Unidos |
description |
This paper presents the tectonostratigraphic evolution of the Maimara Basin and explores the relationship between the clastic sediments and pyroclastic deposits in the basin and the evolution of the adjacent orogeny and magmatic arc. The sedimentary facies in this part of the basin include, in ascending order, an ephemeral fluvial system, a deep braided fluvial system and a medial to distal ephemeral fluvial system. We interpret that Maimara Formation accumulated in a basin that has developed two stages of accumulation. Stage 1 extended from 7 to 6.4 Ma and included accelerated tectonic uplift in the source areas, and it corresponds to the ephemeral fluvial system deposits. Stage 2, which extended from 6.4 to 4.8 Ma, corresponds to a tectonically quiescent period and included the development of the deep braided fluvial system deposits. The contact between the Maimara and Tilcara formations is always characterized by a regional unconformity and, in the study area, also shows pronounced erosion.Rare earth element and other chemical characteristics of the tuff intervals in the Maimara Formation fall into two distinct groups suggesting the tuffs were erupted from two distinct late Miocene source regions. The first and most abundant group has characteristics that best match tuffs erupted from theGuacha, Pacana and Pastos Grandes calderas, which are located 200 and 230 km west of the study area at 22º-23º30´0 S latitude. The members the second group are chemically most similar to the Merihuaca Ignimbrite from the Cerro Galan caldera 290 km south-southwest of the studied section. The distinctive geochemical characteristics are excellent tools to reconstruct the stratigraphic evolution of the Neogene Maimara basin from 6.4 to 4.8 Ma. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/43416 Galli, Claudia Inés; Coira, Beatriz Lidia Luisa; Alonso, Ricardo Narciso; Iglesia Llanos, Maria Paula; Prezzi, Claudia Beatriz; et al.; Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 72; 12-2016; 137-158 0895-9811 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/43416 |
identifier_str_mv |
Galli, Claudia Inés; Coira, Beatriz Lidia Luisa; Alonso, Ricardo Narciso; Iglesia Llanos, Maria Paula; Prezzi, Claudia Beatriz; et al.; Tectonostratigraphic history of the Neogene Maimará basin, Northwest Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 72; 12-2016; 137-158 0895-9811 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2016.09.007 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981116301766 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613497908887552 |
score |
13.070432 |